Betty is the cleaner a the local courthouse. On the bus ride to work one day, she grows tired of all the liberties her fellow citizens take. She falls asleep and dreams about what she'd do if she were the judge. Among her decrees: a thoughtless smoker learns about second-hand smoke the hard way, and an obnoxious celebrity impersonator is rewarded by having his ears blasted with imitations of Tarzan and the Shadow. (http://en.wikipedia.org/wiki/Judge_for_a_Day)
Like many Fleischer cartoons of the era, they built actual sets on a turntable to be used as backgrounds. It was called a rotograph.
"Popeye the Sailor Meets Sinbad the Sailor" and "Popeye Meets Ali Baba and his 40 Thieves", the two featurettes, are probably the best-known cartoons to use the technique.
I have seen a lot of animation and I can't work out how they did the tracking shot at the beginning of this. The buildings seem to be 3-dimensional and not just with flat drawings on different levels, as with the Disney multiplane technique.